/* 基础样式 */
:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --success-color: #4cc9f0;
    --danger-color: #f72585;
    --warning-color: #f8961e;
    --light-bg: #f8f9fa;
    --dark-bg: #212529;
    --border-color: #e9ecef;
    --text-main: #2b2d42;
    --text-secondary: #6c757d;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--light-bg);
}

.sa-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.site-header {
    background: white;
    box-shadow: var(--shadow);
    padding: 15px 0;
}

.site-header .sa-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-branding {
    display: flex;
    align-items: center;
    gap: 15px;
}

.site-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0;
}

.site-title a {
    color: var(--primary-color);
    text-decoration: none;
}

.site-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.main-navigation ul {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.main-navigation a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.main-navigation a:hover {
    color: var(--primary-color);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.login-btn, .logout-btn {
    padding: 8px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.login-btn {
    background: var(--primary-color);
    color: white;
}

.logout-btn {
    background: #f8f9fa;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

/* 主要内容区域 */
.site-content {
    min-height: calc(100vh - 200px);
    padding: 30px 0;
}

/* 页脚样式 */
.site-footer {
    background: white;
    border-top: 1px solid var(--border-color);
    padding: 40px 0 20px;
}

.footer-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-widget h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-main);
}

.footer-widget p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.footer-widget ul {
    list-style: none;
    padding: 0;
}

.footer-widget li {
    margin-bottom: 8px;
}

.footer-widget a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-widget a:hover {
    color: var(--primary-color);
}

.site-info {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.theme-credit a {
    color: var(--primary-color);
    text-decoration: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .site-header .sa-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .main-navigation ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .site-info {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}